Revista de Ingeniería

revinge | eISSN 2011-0049 | ISSN 0121-4993

Effect of the Load Unbalance on the Reliability Assessment of a Power Distribution System

No. 25 (2007-05-01)
  • Oscar Gómez Carmona
    Ingeniero Electricista, M.Sc. en Ingeniería Eléctrica. Profesor auxiliar, Facultad de Ingeniería, Universidad Tecnológica de Pereira. Pereira, Colombia. jr@utp.edu.co.
  • Carlos J. Zapata
    Ingeniero Electricista, M.Sc. en Ingeniería Eléctrica. Profesor asociado, Facultad de Ingeniería, Universidad Tecnológica de Pereira. Pereira, Colombia. cjzapata@utp.edu.co.
https://doi.org/10.16924/revinge.25.6

Abstract

Many three-phase distribution feeders are unbalanced because, first, they serve their customers by means of single–phase distribution transformers; second, they use components which operate in single-phase manner; third, most of the failures that affect their components are single–phase. This important fact must be included in reliability studies because, as shown in this paper, when the contrary is assumed pessimistic assessments of the reliability indices are obtained which could lead to erroneous investment decisions.

Keywords: Power system reliability, power distribution systems, Montecarlo simulation